Nut-lock



UNITED STATES PATENT OFFICE.

JOHN M. STAPLES, OF ROSE MILLS, VIRGINIA.

NUT-Loo K.

SPECIFICATION forming part of Letters Patent No. 363,430, dated May 24,1887.

Application filed November 4, 1886. Serial No. 217,948. (No model.)

.To all whom it may concern..-

VBe it known that I, JOHN M. STAPLES, a citizen of the United States,residing at Rose Mills, in the county of Amherst and State of Virginia,have invented certain new and useful Improvements in Nut-Locks, of whichthe following isa specification, reference being had therein to theaccompanying drawings.

My .present invention relates to that class of nut-locks wherein'a pawlis pivoted to the nut to prevent the nut from turning.

The object of my invention is to provide means which shall excludesnow,di1t, and other foreign matter from the recess in which the pawl isplaced in order to prevent thesame from becoming clogged, 85e.; and tothese ends the invention consists in the construction, combination, andarrangement of the several parts, substantially as hereinafter morefully set forth, and specifically pointed out in the claim.

In the accompanying drawings, which form a part of this specification,Figure lis aside clevation, partly in section, of a nut-lock having myimprovement applied thereto. Fig. 2 is an end view thereof, lookingtoward the nut. Fig. 3 is aperspective of the nut detached from thebolt. Fig. 4 is a perspective view of the cap or cover. Fig. 5 is adetached section taken through the nut, pawl, and its cover, the bolthaving been removed from the nut; and Fig. 6 is an end elevation withthe cap-plate removed to more clearly show the nut-locki`ng mechanism.

In the drawings, A represents a bolt having a screw-threaded portion,through which are longitudinal grooves or channels a.

B designates the nut having the central screw-threaded aperture for thereception of the bolt A, having a recess, b, formed in its outer facefor the reception of a locking-pawl.

C designates a pawl which rest-s within the recess b and is pivoted tothe nut a at a', the inner'end of the pawl being pressed inwardly in thepath of the bolt by the constant force of a spring, b.

D designates a cover or plate for the recess containing the lockingmechanism, the edges of the cover extending beyond the edges of therecess in order to prevent dirt and other foreign matter from enteringsaid recess. This cover is pivoted at d., which permits it to be swungin the direction indicated by the arrow m min Fg.2. This cover isprovided on its under side with a lug or nib,which engages withindentation or socket d in the outer face of the pawl when it is desiredto retain the cover over the locking mechanism, or with one of a seriesof indentations, d2, in the outer face of the nut when it is desired tosecure the plate in a posit-ion which will expose a portion of thelocking mechanism.

I reserve the right to make such changes in details of construction asfairly fall within the scope of my invention.

Having described my invention, what I claim f In a nut-lock, thecombination, with a bolt, of a nut having a springactuated pawl counl vJ N O, M. STAPLES.

Vitnesses: A

HENRY LORING, J r., M. V. PROEEITT.

